Oxyacetylene welding torch



IVI. F. SCHWORVI. y OXYACETYLENE WELDING TORCH.

APPLICATION FILED JuNEza. 192,1

Patented Oct. l?, 11922.

Patented oa. i?, reza. k f l 1,432,411@

NETE@ STATES PATNT FFHQE.

MELVILLE F. SCHWORM, OE MASSILLON, OHIO.

OXYACETYLENE WELDING TORCH.

Application led .Tune 28, 1921. Serial No. 481,004.

T all tlf/tom t may concern.' Similar numerals of reference indicate Be it known that lf, MELVILLE FSCHWORM, corresponding parts throughout the draw- 55 citizen of the United States, residing at ings: Massillon, in the county of Stark and State The handle ofA the torch comprises the of Ohio, have invented a new and useful open end cylinder 1, into one end of Oxyacetylene Welding Torch, of which the which is inserted the reduced annular porfollowing is a specifica-tion. tion 2 of the valve block 3, having the spaced 60 This invention relates to Oxy-acetylene passages et and 5 therethrough, which conwelding torches and has for its objects to pronect at their outer ends with the enlarged l0 vide a torch of this character in which the sockets 6 and 7 respectively, and which remixing of the oxygen and acetylene takes oeive the oxygen and acetylene valves 8 and place just prior to the delivery of the gases respectively, the usual flexible tubes 10 be- 65 to the tip of the torch, means being provided ing connected to said valves and communifor preheating the oxygen prior to the mixeating with suitable sources of supply of thel ing of the gases, thus supplying the mixture respective gases.

with hot oxygen which increases the tem- The cylinder block 11 is located in the perature of the flame, means also being proother extremity of the handle 1 and pro- 70 vided for preventing the acetylene from bevided with the central bore 12, through coming overheated and decomposing prior which the acetylene tube 13 is passed, the

to the mixture of the gases. y rear extremity of said tube being inserted The above and other objects may be atinto the enlarged inner end of the passage 5. tained by lowering the acetylene supply tube An enlargedv counter bore 14 is rovided 75 within the oxygen tube in order to lower in the outer end of the block 11 anc receives the temperature of the acetylene to prevent the extremity of the enlarged oxygen tube decomposing thereof and to preheat the 15, the inclined passage 16 through the block oxygen; a multiple mixer being provided providing communication between said tube adjacent to the head which carries the tip and the oxygen tube 17, which is located 80 of the torch, the acetylene and oxygen bethrough the handle and communicates with ing mixed therein in streams which are pro-y the passage 4 in the valve block.

jected at angles into the mixing chamber in The oxygen tube 15 is provided at its which the streams of mixed gases are furother extremity -with internal threads as ther mixed together. shown at 18, the multiple mixer 19 being lo- 85 With these objects in view, the invention cated therein and spaced from the end of the consists in the construction and arrangetube. This multiple mixer is provided with ment of parts, hereinafter described and ilthe reduced nipple 20 into which is inserted lustrated in the accompanying drawings, .it the adjacent extremity of the acetylene tube being understood that various changes in 13, said tube being preferably provided with 90 the form and details of construction may be the bend 21 to allow for expansion and conmade within the scope of the appended traction of the same.

claims. The multiple mixer is provided with a The preferred embodiment of the invenplurality of inclined passages 22, connected tion thus set forth in general terms is illusat one end with the acetylene tube 21, and at 95 trated in the accompanying drawings, in the other end with the oppositely inclined whichpassages 23, intermediate the extremities Figure 1 is a side elevation of a welding thereof, said passages 23 communicating torch embodying the invention; with the oxygen tube 15 and with the ta- Fig. 2, a longitudinal, sectional View of pered mixing chamber 24 formed in the 100 the same upon an enlarged scale; threaded nipple 25 of the head 26, said nip- F ig. 3, a detail perspective view of the ple being extended into the internally multiple mixer; and threaded extremity of the tube 15.

Fig. 4, a perspective view of the block in The reduced extremity of the mixing the handle through which the oxygen and chamber 24 connects with an expansion 105 acetylene tubes are located. chamber 27 provided in the head, any usual the acetylene from becoming` overheatedand decomposing, While at the same time the oxygen is preheated as i't passes through the tube 15, before entering the mixer, thus reducingthe liability of filling the flame with cold oxygen, the heated oxygen producing a much hotter flame. y

By preheating the oxygen before passing it into the mixing chamber, less oxygen is required for the flame, land the possibility of' oxidizing the metal is reduced to a minimum. With this construction, a very soft and Well proportioned flame is produced which is easy to handle and which produces soft and ductile welds.

The multiple mixer being provided With the oxygen and acetylene passages, slightly inclined toward each other, terminatingin a single passage, creates what mightl be termed, a double suctionor vacuum. `When one or the other of the gases for any reason increases or decreases in pressure, these fluctuations or variations in pressure being -frequent in alltypes of regulating and controlling devices in common use, the gas With the greatest velocity will siphon the other gas, tending to maintain a uniform flame and eliminating the 'frequent changing of the flame from carbonizing tooxi'ding or vice versa. U 'i l claim f l l; A torch of the characterv described, including an oxygen tube, an acetylene tube oi smaller diameter than thel oxygen tube and located therein, a multiplemixer'located Within the oxygen tube and provided With a reduced nipple spaced from the inner Walls of the oxygen tube, the extremity of the acetylene tube` extending into said nipple, said multiple mixer being provided With a plurality of passages communicating With the oxygen tube and a plurality of passages communicating with the acetylene tube and with the first named passages.

2. A torch of the character described, including anl oxygen tube, an acetylene tube of smaller diameter than the oxygen tube and located'therein, a multiple mixer in the oxygen tube and provided With a reduced nipple spaced from the inner walls of the oxygen tube, the extremity of the acetylene tube extending into said nipple, said multiple mixer being provided With a plurality of converging passages surrounding the nipple and communicating with the oxygen tube' and a plurality of passages communicating with the acetylene tube and with the first named passages.

3. A torch of the character described, 'including an 'oxygen tube, an acetylene tube of smaller diameter than the oxygen tube i and located therein, a multiple mixer located Within the oxygen tube and provided with a reducednipple spaced from the inner walls of the oxygen tube, the extremity of the acetylene tube extending into said nipple, said multiple mixer being provided lWith a plurality of' passages communicating with the oxygen tube and a plurality of passages communicating with the vacetylene tube and with the first named passages, a head c o'nnected to the multiple mixer, and a tip connected to-the head, the head being provided with a mixing chamber terminating in a restricted throat and the tip having an expansion chamberv throughout its length communicating With the restricted throat and terminating at the point of the tip vin a single restricted passage. i f

In testimony that I claim the above, I have hereunto subscribed my name.

MELVILLE F. SCHWORM, 

